15
(3) Special cautions on wiring
Use shielded wires for inter-unit control wiring (c) and ground
the shielded on both sides.
All wiring except inter-unit control wiring (c) has polarity.
Otherwise misoperation due to noise may be generated at
times.
When linking outdoor units in a network (S-net link system),
remove the short plug (CN4, 2P Black, location: near CPU
on the outdoor control PCB) from all outdoor units except
one. Otherwise the communication of S-net link system does
not perform.
In case of no link system (No connection wiring between
outdoor units), do not remove the short plug.
Do not wire the inter-unit control wiring such as loop wiring
(Fig. below)
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
0824_M_I
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
NG
NG
Branch point
Outdoor unit
Outdoor unit
Outdoor unit
0192_M_I
Prohibited
Prohibited
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Do not install the inter-unit control wiring such as branch
wiring.
Star branch wiring causes mis-address setting.
If branching the inter-unit control wiring, the No. of branch
point should be 10 or less.
(The branch length less than 1 m does not include the branch
No.)
Outdoor unit
Outdoor unit
Outdoor unit
0193_M_I
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
more than 1 m
more than 1 m
Branch
point
10 or less
Indoor unit
Indoor unit
Indoor unit
Indoor unit
less than 1 m
Indoor unit
CN4
Shielded wire
EG